. >>> steven tyler and jennifer lopez are making their debut on american idol. last hour, we introduced to you kelly powers. now we meet courtney scatter. >> i'm 19 years old. >> courtney salter hopes this american idol audition will be different. she tried out twice before y the second time i for got the words. >> reporter: she has never made it this far going before the idol judges in jersey city trying to get to hollywood. >> i know i just need just a couple of minutes. >> reporter: her knees shook anxiously waiting for her turn to perform. shelby casey is np us for her too. >> music is her life so we're really excited about this doesn't. this will change her whole world. >> reporter: court me has more than 20,000 follow ares on her youtube channel. american idol has 20 million. >> the contestanted this year more than ever have said they've grown up watching the show. >> reporter: with new judges steven tyler and jennifer lopez added to the mix, this year's contestanted aren't sure what to expect. >> i've been all so far, all of those things, tough easy and f